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Finding the Fourth Proportional to 339,653.80, 509,156.70 and 126,364.60

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Solution

The fourth proportional to 339,653.80, 509,156.70 and 126,364.60 is: 189,426.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,653.80 : 509,156.70 = 126,364.60 : x
  2. Step 2: Convert to fraction form
    339,653.80/509,156.70 = 126,364.60/x
  3. Step 3: Cross multiply
    339,653.80x = 509,156.70 × 126,364.60
  4. Step 4: Simplify right side
    339,653.80x = 64,339,382,732.82
  5. Step 5: Solve for x
    x = 64,339,382,732.82/339,653.80
  6. Step 6: Final answer
    x = 189,426.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.